@import url('https://fonts.googleapis.com/css2?family=Special+Elite&family=Oswald:wght@300;400;600;700&family=Courier+Prime:ital,wght@0,400;0,700;1,400&display=swap');

/*  RESET & VARS  */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }

:root {
  --bg:       #0a0804;
  --p1:       #161310;
  --p2:       #11100a;
  --p3:       #1c1810;
  --tan:      #d4b474;
  --tan-d:    #9e8656;
  --tan-h:    #f0da9c;
  --olive:    #546428;
  --olive-h:  #a0b84a;
  --rust:     #9e3822;
  --rust-h:   #d04838;
  --cream:    #e8d4a0;
  --cream-d:  #a8986c;
  --bdr:      #2a2016;
  --bdr2:     #362a1a;
  --ink:      #060402;
  --sonar:    #020c06;
  --sgreen:   #28a028;
  --sgreen-h: #48c848;
  --warn:     #e0a040;
  --warn-txt: #f0a0a0;
}

html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--cream);
  font-family: 'Courier Prime', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

/*  STICKY HEADER  */
.sticky-header {
  position: sticky; top: 0; z-index: 200;
}

/*  TOP BAR  */
.topbar {
  background: var(--p1);
  border-bottom: 2px solid var(--bdr2);
  display: flex; align-items: center;
  padding: 8px 12px; gap: 10px;
}
.topbar-logo {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 0 5px rgba(0,0,0,.55));
}
.topbar-info { flex: 1; min-width: 0; }
.topbar-title {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(14px, 3.8vw, 20px);
  font-weight: 700; letter-spacing: 2px;
  color: var(--tan-h); line-height: 1;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-sub {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(8px, 2vw, 12px);
  letter-spacing: 1.5px; color: var(--tan-d);
  text-transform: uppercase; margin-top: 1px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.classified {
  border: 1.5px solid var(--olive);
  padding: 4px 8px;
  font-family: 'Oswald', sans-serif;
  font-size: 10px; letter-spacing: 3px;
  color: var(--olive-h); transform: rotate(-2deg);
  white-space: nowrap;
}
.pip {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--olive-h);
  box-shadow: 0 0 6px var(--olive-h);
  animation: pip 2.5s infinite;
}
@keyframes pip { 0%,100%{opacity:1} 50%{opacity:.2} }

/*  MAIN NAV TABS  */
.main-tabs {
  display: flex;
  background: var(--p2);
  border-bottom: 2px solid var(--bdr2);
  overflow-x: auto;
  scrollbar-width: none;
}
.main-tabs::-webkit-scrollbar { display: none; }
.mtab {
  flex: 1 1 0;
  padding: 10px 16px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(10px, 3vw, 12px);
  letter-spacing: 2px;
  color: var(--cream-d);
  text-transform: uppercase;
  cursor: pointer;
  border-right: 1px solid var(--bdr);
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  transition: all .15s;
  user-select: none;
}
.mtab:last-child { border-right: none; }
.mtab.active { color: var(--tan-h); border-bottom-color: var(--tan); background: var(--p1); }

/*  PAGES  */
.page { display: none; }
.page.active { display: block; }

/*  SONAR module — always flex column: canvas fills, stats pinned bottom  */
.sonar-wrap {
  background: var(--sonar);
  border-bottom: 2px solid var(--bdr2);
  position: relative;
  display: flex;
  flex-direction: column;
}
.sonar-canvas-el {
  display: block;
  flex: 1 1 0%;
  min-height: 0;
  min-width: 0;
  width: 100%;
}
.sonar-stats {
  flex: 0 0 auto;
  border-top: 1px solid var(--bdr2);
  width: 100%;
}
.sonar-overlay-label {
  position: absolute; top: 6px; left: 10px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(10px, 2.5vw, 14px); letter-spacing: 2px;
  color: rgba(72,200,72,.5);
  text-transform: uppercase;
  pointer-events: none;
  line-height: 1.3;
  transition: color 0.3s;
}
.sonar-overlay-label.flash {
  animation: result-pulse 0.8s ease 3;
}
@keyframes result-pulse {
  0%,100%{opacity:1} 50%{opacity:0.35}
}
/* live stats below sonar */
.ss-hdr {
  padding: 4px 8px 2px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(7px, 2vw, 9px);
  letter-spacing: 3px;
  color: var(--olive-h);
  text-align: center;
  text-transform: uppercase;
  border-bottom: 1px solid var(--bdr);
}
.ss-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}
.ss {
  min-width: 0;
  padding: 5px 4px;
  text-align: center;
  border-right: 1px solid var(--bdr);
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}
.ss:last-child { border-right: none; }
.ss-label {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(10px, 2.5vw, 12px);
  color: var(--tan-d); text-transform: uppercase;
  white-space: nowrap;
}
.ss-val {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(16px, 4vw, 24px);
  font-weight: 700; color: var(--tan-h);
  line-height: 1;
  white-space: nowrap;
}
.ss-val.warn { color: var(--warn); }
.ss-val.danger { color: var(--rust-h); }
.ss-val.good { color: var(--olive-h); }

/*  STEP TABS  */
.step-tabs {
  display: flex;
  background: var(--p2);
  border-bottom: 2px solid var(--bdr2);
  overflow-x: auto; scrollbar-width: none;
}
.step-tabs::-webkit-scrollbar { display: none; }
.stab {
  flex: 1; min-width: 46px;
  padding: 8px 4px 6px;
  text-align: center;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(8px, 2.3vw, 10px);
  letter-spacing: 1px;
  color: var(--tan-d);
  text-transform: uppercase;
  border-right: 1px solid var(--bdr);
  cursor: pointer; user-select: none;
  transition: all .15s;
  position: relative;
}
.stab:last-child { border-right: none; }
.stab .sn { display:block; font-size:clamp(10px,3vw,14px); font-weight:700; line-height:1; margin-bottom:1px; }
.stab.active { background: var(--p1); color: var(--tan-h); }
.stab.active::after { content:''; position:absolute; bottom:0; left:0; right:0; height:2px; background:var(--tan); }
.stab.done { color: var(--olive-h); }

/*  STEP CONTENT  */
.step-content {
  padding: 14px;
  max-width: 640px;
  margin: 0 auto;
}

/* Crew card */
.crew-card {
  background: var(--p2);
  border: 1px solid var(--bdr2);
  border-left: 3px solid var(--tan-d);
  border-radius: 2px;
  padding: 10px 12px;
  margin-bottom: 12px;
}
.crew-role {
  font-family: 'Oswald', sans-serif;
  font-size: 8px; letter-spacing: 3px;
  color: var(--tan-d); text-transform: uppercase;
  margin-bottom: 3px;
}
.crew-ask {
  font-family: 'Special Elite', cursive;
  font-size: clamp(13px, 4vw, 15px);
  color: var(--tan-h); line-height: 1.4;
}
.say-box {
  background: rgba(212,180,116,.05);
  border: 1px dashed var(--tan-d);
  border-radius: 2px;
  padding: 8px 10px; margin-top: 8px;
  font-family: 'Special Elite', cursive;
  font-size: clamp(12px, 3.5vw, 14px);
  color: var(--cream); position: relative;
}
.say-lbl {
  position: absolute; top: -7px; left: 8px;
  background: var(--p2); padding: 0 5px;
  font-family: 'Oswald', sans-serif;
  font-size: 7px; letter-spacing: 3px; color: var(--tan-d);
}

/* Control label */
.ctrl-lbl {
  display: block;
  font-family: 'Oswald', sans-serif;
  font-size: 8px; letter-spacing: 3px;
  color: var(--tan-d); text-transform: uppercase;
  margin-bottom: 6px;
}

/* Big value display */
.big-val {
  display: flex; align-items: center; justify-content: center;
  background: var(--p2); border: 1px solid var(--bdr2);
  padding: 10px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(36px, 12vw, 52px);
  font-weight: 700; color: var(--tan-h);
  letter-spacing: 3px; margin-bottom: 8px;
  min-height: 72px;
}
.big-val .u { font-size: clamp(14px,4vw,18px); color:var(--tan-d); margin-left:4px; font-weight:400; }

/* Range keypad */
.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.key {
  background: var(--p2); border: 1px solid var(--bdr2); border-radius: 2px;
  padding: clamp(12px,4vw,16px) 6px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(18px,6vw,24px); font-weight:600;
  color: var(--cream); text-align: center;
  cursor: pointer; user-select: none;
  transition: background .1s;
  touch-action: manipulation;
}
.key:active, .key.kp { background: var(--tan-d); color: var(--ink); }
.key.del { font-size: clamp(11px,3.5vw,14px); color: var(--rust-h); }
.key.ok  { background: var(--olive); border-color: var(--olive-h); color: var(--ink); font-size: clamp(10px,3vw,13px); letter-spacing:2px; }
.key.ok:active { background: var(--olive-h); }

/* Slider */
.slider-wrap { margin: 4px 0 8px; }
input[type=range] {
  -webkit-appearance: none; width: 100%; height: 4px;
  background: var(--p2); border: 1px solid var(--bdr2);
  outline: none; cursor: pointer;
  accent-color: var(--tan);
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  background: var(--tan);
  border: 2px solid var(--tan-h);
  border-radius: 50%; cursor: pointer;
  margin-top: -9px;
  box-shadow: 0 0 4px rgba(0,0,0,.4);
}
input[type=range]::-webkit-slider-runnable-track {
  height: 4px;
  background: linear-gradient(to right, var(--tan-d) 0%, var(--tan-d) var(--fill,50%), var(--p2) var(--fill,50%));
}
input[type=range]::-moz-range-track {
  height: 4px;
  background: var(--p2);
  border: 1px solid var(--bdr2);
}
input[type=range]::-moz-range-progress {
  height: 4px;
  background: var(--tan-d);
}
input[type=range]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--tan);
  border: 2px solid var(--tan-h);
  border-radius: 50%;
  box-shadow: 0 0 4px rgba(0,0,0,.4);
}
.tick-row {
  display: flex; justify-content: space-between;
  font-size: clamp(8px,2.5vw,10px); color: var(--cream-d); margin-top: 3px;
}

/* Fine adjust buttons */
.fine-row { display: flex; gap: 6px; align-items: center; margin-bottom: 8px; }
.fine-btn {
  flex: 0 0 clamp(48px,14vw,60px); height: clamp(48px,14vw,60px);
  background: var(--p2); border: 1px solid var(--bdr2); border-radius: 2px;
  color: var(--tan);
  font-size: clamp(22px,7vw,30px); font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; user-select: none;
  touch-action: manipulation;
  transition: background .1s;
}
.fine-btn:active { background: var(--tan-d); color: var(--ink); }
.fine-disp {
  flex: 1;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(28px,9vw,38px); font-weight: 700;
  color: var(--tan-h); text-align: center;
  background: var(--p2); border: 1px solid var(--bdr2); padding: 8px;
}

/* Option grid */
.opt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-bottom: 8px; }
.opt-btn {
  padding: clamp(10px,3vw,14px) 6px;
  background: var(--p2); border: 1px solid var(--bdr2); border-radius: 2px;
  color: var(--cream-d);
  font-family: 'Oswald', sans-serif;
  font-size: clamp(10px,3vw,12px); letter-spacing:1px;
  cursor: pointer; text-align: center;
  transition: all .15s; user-select: none;
  text-transform: uppercase; touch-action: manipulation;
}
.opt-btn .od { font-size: clamp(17px,6vw,22px); font-weight:700; display:block; line-height:1.2; }
.opt-btn .os { font-size: clamp(8px,2.5vw,10px); letter-spacing:.5px; opacity:.65; line-height:1.3; display:block; margin-top:1px; }
.opt-btn.sel { background: var(--tan-d); border-color: var(--tan); color: var(--ink); font-weight:600; }
.opt-btn:active { opacity:.7; }
.opt-wide { grid-column: 1 / -1; }

/* Tube diagram + buttons */
.tube-diagram { width: 100%; max-width: 300px; display: block; margin: 8px auto 10px; }
.tube-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 10px; }
.tube-btn {
  padding: clamp(14px,4vw,20px) 8px;
  background: var(--p2); border: 2px solid var(--bdr2); border-radius: 2px;
  color: var(--cream-d);
  font-family: 'Oswald', sans-serif;
  font-size: clamp(11px,3.5vw,14px); letter-spacing:2px;
  cursor: pointer; text-align: center;
  transition: all .15s; user-select: none; text-transform: uppercase;
  touch-action: manipulation;
}
.tube-btn .ti { font-size: clamp(22px,8vw,32px); display:block; margin-bottom:4px; }
.tube-btn.sel { background: var(--tan-d); border-color: var(--tan); color: var(--ink); font-weight:700; }

/* Hint box */
.hint {
  background: rgba(212,180,116,.04);
  border: 1px solid var(--bdr2); border-radius: 2px;
  padding: 8px 10px; margin-bottom: 10px;
  font-family: 'Special Elite', cursive;
  font-size: clamp(11px,3.5vw,13px);
  color: var(--cream-d); line-height: 1.7;
}

/* Divider */
.hr { border: none; border-top: 1px solid var(--bdr); margin: 10px 0; }

/*  NAV BAR  */
.nav-bar {
  position: sticky; bottom: 0; z-index: 190;
  display: flex; gap: 6px; padding: 10px 14px;
  background: var(--p1); border-top: 2px solid var(--bdr2);
}
.nav-btn {
  flex: 1; padding: clamp(12px,4vw,15px) 6px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(11px,3.5vw,13px); font-weight:700; letter-spacing:3px;
  border: 2px solid var(--bdr2); border-radius: 2px;
  cursor: pointer; text-transform: uppercase; text-align: center;
  user-select: none; transition: all .15s; touch-action: manipulation;
}
.nav-back { background: var(--p2); color: var(--cream-d); }
.nav-back:active { background: var(--bdr2); }
.nav-next { background: var(--tan-d); color: var(--ink); }
.nav-next:active { background: var(--tan); }
.nav-fire { background: var(--rust); color: var(--cream); border-color: var(--rust-h); font-size: clamp(13px,4vw,16px); }
.nav-fire:active { background: var(--rust-h); }

/*  SOLUTION PAGE  */
.sol-card {
  background: var(--p2); border: 1px solid var(--bdr2); border-radius: 2px;
  overflow: hidden; margin-bottom: 12px;
}
.sol-hdr {
  background: rgba(212,180,116,.06);
  border-bottom: 1px solid var(--bdr2);
  padding: 8px 12px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(9px, 2.5vw, 11px); letter-spacing:4px; color: var(--tan-d); text-transform: uppercase;
}
.sol-row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px;
  padding: 9px 12px; border-bottom: 1px dashed var(--bdr);
}
.sol-row:last-child { border-bottom: none; }
.sol-key { font-size: clamp(11px, 3vw, 14px); color: var(--cream-d); letter-spacing:1px; min-width:0; }
.sol-val {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(20px, 5.5vw, 34px); font-weight:700; color: var(--tan-h);
  text-align: right;
  white-space: nowrap;
  flex-shrink: 0;
}
.sol-val .su { font-size: clamp(12px, 3vw, 14px); color: var(--tan-d); font-weight:400; margin-left:2px; }
.fine-disp .su { font-size: clamp(12px, 3vw, 14px); color: var(--tan-d); font-weight:400; margin-left:2px; }
.sol-val.warn { color: var(--warn); }
.sol-val.danger { color: var(--rust-h); }
.sol-val.good { color: var(--olive-h); }

/* hit bar */
.hit-bar-wrap { padding: 6px 12px 10px; }
.hit-bar-bg { height: 8px; background: var(--bdr2); border-radius:1px; overflow:hidden; }
.hit-bar-fill { height: 100%; transition: width .4s ease, background .4s; }
.hit-bar-row { display:flex; justify-content:space-between; font-size: clamp(8px,2.5vw,10px); color: var(--cream-d); margin-top:3px; }
.hit-bar-row span:nth-child(2) { text-align:center; padding:0 6px; }

/* callout card */
.callout-card {
  background: var(--p2); border: 1px solid var(--bdr2); border-left: 3px solid var(--rust-h);
  border-radius: 2px; padding: 12px 14px; margin-bottom: 12px; position: relative;
}
.callout-card::before {
  content: 'COMMANDER READS ALOUD';
  position: absolute; top: -9px; left: 10px;
  background: var(--p2); padding: 0 7px;
  font-family: 'Oswald', sans-serif; font-size: clamp(9px, 2.8vw, 12px); letter-spacing:3px; color: var(--rust-h);
}
.callout-text {
  font-family: 'Special Elite', cursive;
  font-size: clamp(15px, 5vw, 22px); line-height: 1.7; color: var(--tan-h);
  overflow-wrap: anywhere;
}
.warn-banner {
  background: rgba(158,56,34,.15); border: 1px solid var(--rust); border-radius: 2px;
  padding: 8px 10px; margin-bottom: 8px;
  font-family: 'Special Elite', cursive; font-size: clamp(11px,3.5vw,13px);   color: var(--warn-txt);
  display: none;
}
.warn-banner.show { display: block; }

/*  MATH / HOW IT WORKS PAGE  */
.math-page { padding: 14px; margin: 0 auto; }
.math-section { margin-bottom: 24px; break-inside: avoid; }
.math-h1 {
  font-family: 'Oswald', sans-serif; font-size: clamp(18px,5vw,24px);
  font-weight: 700; letter-spacing:3px; color: var(--tan-h);
  padding-bottom: 8px; border-bottom: 1px solid var(--bdr2);
  margin-bottom: 12px; text-transform: uppercase;
}
.math-h2 {
  font-family: 'Oswald', sans-serif; font-size: clamp(15px,4vw,18px);
  font-weight: 600; letter-spacing:2px; color: var(--tan);
  margin-bottom: 8px; text-transform: uppercase;
}
.math-p {
  font-family: 'Courier Prime', monospace; font-size: clamp(14px,3.5vw,16px);
  color: var(--cream-d); line-height: 1.8; margin-bottom: 10px;
}
.math-p b { color: var(--cream); }
.math-p em { color: var(--tan-h); font-style:normal; }
.math-formula {
  background: var(--p2); border: 1px solid var(--bdr2); border-left: 3px solid var(--tan-d);
  padding: 10px 14px; margin: 8px 0; border-radius: 2px;
  font-family: 'Courier Prime', monospace; font-size: clamp(14px,3.5vw,16px);
  color: var(--tan-h); line-height: 1.8;
}
.math-table { width:100%; border-collapse:collapse; margin: 8px 0; font-size: clamp(13px,3vw,15px); }
.math-table th {
  background: var(--p2); padding: 7px 10px; text-align:left;
  font-family: 'Oswald', sans-serif; letter-spacing:2px; font-weight:600;
  color: var(--tan-d); text-transform:uppercase; border-bottom: 1px solid var(--bdr2);
}
.math-table td {
  padding: 8px 10px; border-bottom: 1px dashed var(--bdr);
  color: var(--cream-d); vertical-align:top;
}
.math-table td:first-child { color: var(--tan-h); font-weight:700; white-space:nowrap; }
.math-warn {
  background: rgba(158,56,34,.12); border: 1px solid var(--rust); border-radius:2px;
  padding: 8px 12px; margin: 8px 0;
  font-family: 'Courier Prime', monospace; font-size: clamp(13px,3vw,14px);
  color: var(--warn-txt); line-height:1.7;
}
.math-good {
  background: rgba(84,100,40,.15); border: 1px solid var(--olive); border-radius:2px;
  padding: 8px 12px; margin: 8px 0;
  font-family: 'Courier Prime', monospace; font-size: clamp(13px,3vw,14px);
  color: var(--olive-h); line-height:1.7;
}
.math-info {
  background: rgba(212,180,116,.06); border: 1px solid var(--tan-d); border-radius:2px;
  padding: 8px 12px; margin: 8px 0;
  font-family: 'Courier Prime', monospace; font-size: clamp(13px,3vw,14px);
  color: var(--tan-h); line-height:1.7;
}

@media (min-width: 900px) {
  .math-page {
    max-width: 1480px;
    padding: 18px 24px;
    columns: 2;
    column-gap: 24px;
  }
  .math-h1 { font-size: 22px; }
  .math-h2 { font-size: 17px; }
  .math-p  { font-size: 15px; }
  .math-formula { font-size: 15px; }
  .math-table { font-size: 14px; }
  .math-warn { font-size: 14px; }
  .math-good { font-size: 14px; }
  .math-info { font-size: 14px; }
}

/* fire flash */
.fire-overlay {
  display:none; position:fixed; inset:0; z-index:999;
  background: rgba(208,72,56,.2);
  animation: fo 1.4s forwards;
}
.fire-msg {
  display:none; position:fixed;
  top:50%; left:50%; transform:translate(-50%,-50%);
  font-family:'Oswald',sans-serif; font-size: clamp(20px,7vw,32px);
  font-weight:700; letter-spacing:6px; color:var(--rust-h);
  text-shadow:0 0 30px var(--rust-h);
  animation: fo 1.4s forwards; z-index:1000;
  white-space:nowrap;
}
.fire-report {
  display:none; position:fixed;
  left:50%; bottom:8vh; transform:translateX(-50%);
  z-index:1000; min-width:min(420px, calc(100vw - 28px));
  background:rgba(10,8,4,.94); border:1px solid var(--bdr2);
  border-left:3px solid var(--tan); padding:10px 12px;
  font-family:'Oswald',sans-serif; letter-spacing:2px; text-transform:uppercase;
  color:var(--cream); box-shadow:0 14px 40px rgba(0,0,0,.55);
}
.fire-report.good { border-left-color:var(--olive-h); color:var(--olive-h); }
.fire-report.bad { border-left-color:var(--rust-h); color:var(--rust-h); }
.fire-report .fr-main { font-size:clamp(16px,5vw,24px); font-weight:700; }
.fire-report .fr-sub { margin-top:4px; font-size:clamp(9px,2.6vw,12px); color:var(--cream-d); letter-spacing:1px; line-height:1.35; }

.discord-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: #5865F2;
  color: #fff;
  border-radius: 3px;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(11px, 3vw, 13px);
  letter-spacing: 1px;
  text-transform: uppercase;
  text-decoration: none;
  margin-left: 4px;
  transition: background .15s;
  white-space: nowrap;
}
.discord-link:hover { background: #4752C4; color: #fff; }
.discord-svg { flex-shrink: 0; }

/*  ABOUT PAGE HERO  */
.about-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 24px 18px 20px;
  background: linear-gradient(180deg, rgba(22,19,16,.98), rgba(17,16,10,.92));
  border-bottom: 2px solid var(--bdr2);
  max-width: 1480px;
  margin: 0 auto;
  box-sizing: border-box;
}
.about-logo {
  width: clamp(72px, 20vw, 110px);
  height: clamp(72px, 20vw, 110px);
  object-fit: contain;
  filter: drop-shadow(0 0 14px rgba(0,0,0,.5));
}
.about-hero-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  align-items: center;
}
.about-regiment {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(22px, 6vw, 34px);
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--tan-h);
  text-transform: uppercase;
  line-height: 1;
}
.about-subtitle {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(11px, 3vw, 14px);
  letter-spacing: 2px;
  color: var(--tan-d);
  text-transform: uppercase;
}
.about-motto {
  font-family: 'Courier Prime', monospace;
  font-size: clamp(12px, 3.5vw, 15px);
  color: var(--olive-h);
  letter-spacing: 1px;
}
@media (max-width: 430px) {
  .about-hero { padding: 16px 14px 14px; gap: 10px; }
  .about-logo { width: clamp(56px, 16vw, 80px); height: clamp(56px, 16vw, 80px); }
}

/*  OFFSET CALIBRATION — testing section  */
.offset-test-section {
  background: rgba(224,160,64,.06);
  border: 1px solid rgba(224,160,64,.25);
  border-radius: 2px;
  padding: 8px 10px;
  margin: 10px 0;
}
.offset-test-lbl {
  display: block;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(8px, 2.3vw, 10px);
  letter-spacing: 2px;
  color: var(--warn);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.offset-fine-disp {
  color: var(--warn) !important;
  border-color: rgba(224,160,64,.3) !important;
}
.offset-fine-row .fine-btn {
  border-color: rgba(224,160,64,.25);
  color: var(--warn);
}
.offset-test-section input[type=range]::-webkit-slider-thumb {
  background: var(--warn);
  border-color: var(--warn);
}
.offset-test-section input[type=range]::-moz-range-thumb {
  background: var(--warn);
  border-color: var(--warn);
}
@keyframes fo { 0%{opacity:1} 80%{opacity:1} 100%{opacity:0} }

@media (max-width: 430px) {
  .topbar { padding: 7px 8px; gap: 7px; }
  .topbar-logo { width: 36px; height: 36px; }
  .topbar-title { font-size: 15px; letter-spacing: 1px; }
  .topbar-sub { font-size: 10px; letter-spacing: .8px; }
  .classified { display: inline-block; font-size: 7px; padding: 2px 5px; letter-spacing: 1px; }
  .sonar-canvas-el { min-height: clamp(220px, 40vh, 300px); flex: 1 1 auto; }
  .ss-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .ss-val { font-size: clamp(15px, 5vw, 18px); }
  .ss-label { font-size: 9px; }
  .ss-hdr { font-size: 8px; letter-spacing: 2px; }
  .ss { padding: 5px 4px; }
  .step-tabs { overflow: visible; }
  .stab { min-width: 0; padding: 6px 3px 5px; font-size: 8px; letter-spacing: .5px; }
  .stab .sn { font-size: clamp(11px, 3.5vw, 13px); }
  .step-content { padding: 10px; }
  .opt-grid { grid-template-columns: 1fr; }
  .tube-grid { grid-template-columns: 1fr; }
}

@media (min-width: 431px) and (max-width: 899px) {
  .sonar-canvas-el { min-height: clamp(260px, 36vh, 380px); flex: 1 1 auto; }
  .ss-val { font-size: 20px; }
  .ss-label { font-size: 10px; }
}

@media (min-width: 900px) {
  body {
    background:
      linear-gradient(180deg, rgba(22,19,16,.96), rgba(6,4,2,1) 340px),
      var(--bg);
  }

  #page-fire.active {
    display: grid;
    grid-template-columns: minmax(360px, 420px) minmax(520px, 1fr);
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 12px 14px;
    height: calc(100vh - 105px);
    max-width: 1480px;
    margin: 0 auto;
    padding: 14px 18px;
    overflow: hidden;
  }

  .main-tabs {
    max-width: 1480px;
    margin-left: auto;
    margin-right: auto;
    border-left: 1px solid var(--bdr2);
    border-right: 1px solid var(--bdr2);
  }

  .sonar-wrap {
    grid-column: 2;
    grid-row: 1 / 4;
    height: 100%;
    border: 1px solid var(--bdr2);
    box-shadow: 0 18px 50px rgba(0,0,0,.35);
  }

  .sonar-canvas-el {
    flex: 1 1 0%;
    min-height: 0;
    max-width: 700px;
    align-self: center;
  }

  .ss {
    padding: 6px 5px;
    gap: 5px;
  }

  .ss-label { font-size: 11px; }
  .ss-val   { font-size: 22px; }
  .ss-hdr   { font-size: 10px; letter-spacing: 3px; padding: 6px 8px 3px; }

  .step-tabs {
    grid-column: 1;
    grid-row: 1;
    border: 1px solid var(--bdr2);
    overflow: hidden;
  }

  .stab {
    padding: 9px 4px 7px;
    min-width: 0;
  }

  .step-content {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    max-width: none;
    min-height: 0;
    overflow: auto;
    padding: 8px 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--tan-d) var(--p2);
  }

  .step-content::-webkit-scrollbar {
    width: 8px;
  }

  .step-content::-webkit-scrollbar-track {
    background: var(--p2);
    border-left: 1px solid var(--bdr2);
  }

  .step-content::-webkit-scrollbar-thumb {
    background: var(--tan-d);
    border: 1px solid var(--bdr2);
  }

  #sp5 .sol-row {
    padding: 5px 10px;
  }

  #sp5 .sol-hdr {
    padding: 5px 10px;
  }

  #sp5 .sol-val {
    font-size: 22px;
  }

  #sp5 .hit-bar-wrap {
    padding: 5px 12px 10px;
  }

  #sp5 .callout-card {
    margin-bottom: 10px;
  }

  #sp5 .callout-text {
    font-size: 18px;
    line-height: 1.55;
  }

  #sp5 .callout-card::before {
    font-size: 12px;
  }

  .tube-diagram {
    max-width: 245px;
    margin-top: 4px;
    margin-bottom: 8px;
  }

  .crew-card,
  .hint,
  .sol-card,
  .callout-card {
    margin-bottom: 6px;
  }

  .crew-card {
    padding: 8px 10px;
  }

  .crew-role {
    font-size: 12px;
    letter-spacing: 2px;
  }

  .crew-ask {
    font-size: 17px;
  }

  .say-box {
    padding: 8px 10px;
    margin-top: 8px;
    font-size: 15px;
  }

  .say-lbl {
    top: -8px;
    font-size: 9px;
    letter-spacing: 3px;
  }

  .ctrl-lbl {
    font-size: 11px;
    letter-spacing: 3px;
    margin-bottom: 8px;
  }

  .hint {
    padding: 10px 12px;
    font-size: 14px;
    line-height: 1.6;
  }

  .sol-hdr {
    font-size: 11px;
    letter-spacing: 4px;
  }

  .key {
    padding: 10px 8px;
    min-height: 52px;
    font-size: 26px;
  }

  .keypad {
    gap: 6px;
  }

  .big-val {
    min-height: 58px;
    padding: 8px;
    font-size: 44px;
  }

  .tube-grid {
    gap: 8px;
    margin-bottom: 10px;
  }

  .tube-btn {
    min-height: 86px;
    padding: 12px 10px;
    font-size: 15px;
    letter-spacing: 2px;
  }

  .tube-btn .ti {
    font-size: 24px;
    margin-bottom: 4px;
  }

  .opt-btn {
    padding: 10px 8px;
  }

  .opt-btn .od {
    font-size: 22px;
  }

  .opt-btn .os {
    font-size: 11px;
  }

  .opt-grid {
    gap: 6px;
    margin-bottom: 10px;
  }

  .fine-btn {
    height: 50px;
    flex-basis: 54px;
    font-size: 32px;
  }

  .fine-disp {
    padding: 7px;
    font-size: 34px;
  }

  .fine-row {
    gap: 6px;
    margin-bottom: 8px;
  }

  .keypad {
    gap: 5px;
  }

  .big-val {
    min-height: 52px;
    padding: 6px;
    font-size: 38px;
  }

  .tube-grid {
    gap: 6px;
    margin-bottom: 8px;
  }

  .tube-btn {
    min-height: 82px;
    padding: 10px 8px;
    font-size: 13px;
    letter-spacing: 2px;
  }

  .tube-btn .ti {
    font-size: 18px;
    margin-bottom: 3px;
  }

  .fine-btn {
    height: 38px;
    flex-basis: 44px;
    font-size: 24px;
  }

  .fine-disp {
    padding: 5px;
    font-size: 24px;
  }

  .opt-btn {
    padding: 9px 6px;
  }

  .opt-btn .od {
    font-size: 20px;
  }

  .opt-btn .os {
    font-size: 10px;
  }

  .opt-grid {
    gap: 5px;
    margin-bottom: 8px;
  }

  .fine-btn {
    height: 46px;
    flex-basis: 50px;
    font-size: 30px;
  }

  .fine-disp {
    padding: 6px;
    font-size: 30px;
  }

  .opt-btn .od {
    font-size: 15px;
  }

  .opt-btn .os {
    font-size: 8px;
  }

  .opt-grid {
    gap: 4px;
    margin-bottom: 6px;
  }

  .nav-bar {
    grid-column: 1;
    grid-row: 3;
    position: static;
    width: 100%;
    padding: 0;
    background: transparent;
    border-top: none;
    margin: 0;
  }

  .nav-btn {
    flex: 1 1 0;
    padding: 10px 6px;
    min-height: 44px;
  }

  .nav-back {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (min-width: 1300px) {
  #page-fire.active {
    grid-template-columns: 420px minmax(640px, 1fr);
    height: calc(100vh - 105px);
  }
}